What does it mean when a girl flirts with you when shes dating someone?

=It can mean a lot of things! but it also depends on so many other things! She probably doesn't want to be with him any more & is trying to make him mad so that he can brake up with her.. Or she can also jus be trying to make him jealous. They may have been going through some problems. It may also mean she might feel or like you. You should try to see how she feels or what is going on with her.=